/*
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)cdefs.h	8.2 (Berkeley) 10/4/93
 */

#ifndef _CDEFS_H_
#define _CDEFS_H_

#if defined(__cplusplus)
#    define __BEGIN_DECLS extern "C" {
#    define __END_DECLS                                                        \
        }                                                                      \
        ;
#else
#    define __BEGIN_DECLS
#    define __END_DECLS
#endif

/*
 * The __CONCAT macro is used to concatenate parts of symbol names, e.g.
 * with "#define OLD(foo) __CONCAT(old,foo)", OLD(foo) produces oldfoo.
 * The __CONCAT macro is a bit tricky -- make sure you don't put spaces
 * in between its arguments.  __CONCAT can also concatenate double-quoted
 * strings produced by the __STRING macro, but this only works with ANSI C.
 */
#if defined(__STDC__) || defined(__cplusplus)
#    define __P(protos) protos /* full-blown ANSI C */
#    define __CONCAT(x, y) x##y
#    define __STRING(x) #    x

#    if !defined(__GNUC__) && !defined(__cplusplus)
#        define inline
#    endif

#else                      /* !(__STDC__ || __cplusplus) */
#    define __P(protos) () /* traditional C preprocessor */
#    define __CONCAT(x, y) x /**/ y
#    define __STRING(x) "x"

#    ifdef __GNUC__
#        define const __const /* GCC: ANSI C with -traditional */
#        define inline __inline
#        define signed __signed
#        define volatile __volatile

#    else             /* !__GNUC__ */
#        define const /* delete ANSI C keywords */
#        define inline
#        define signed
#        define volatile
#    endif /* !__GNUC__ */
#endif     /* !(__STDC__ || __cplusplus) */

/*
 * GCC has extensions for declaring functions as `pure' (always returns
 * the same value given the same inputs, i.e., has no external state and
 * no side effects) and `dead' (nonreturning).  These mainly affect
 * optimization and warnings.  Unfortunately, GCC complains if these are
 * used under strict ANSI mode (`gcc -ansi -pedantic'), hence we need to
 * define them only if compiling without this.
 */
#if defined(__GNUC__) && !defined(__STRICT_ANSI__)
#    define __dead __volatile
#    define __pure __const
#else
#    define __dead
#    define __pure
#endif

#endif /* !_CDEFS_H_ */
